#include <iostream>

double betsy(int);
double pam(int);

void estimate(int lines, double (*pf)(int));

int main(...){
	using namespace std;
	int code;

	cout << "How many lines of code do you need? ";
	cin >> code;
	cout << "Here's Betsy's estimate:\n";
	estimate(code, betsy);
	cout << "Here's Pam's estimate:\n";
	estimate(code ,pam);

	return 0;
}


double betsy(int lns){
	return 0.05 * lns;
}

double pam(int lns){
	return 0.03 * lns + 0.0004 * lns *lns;
}

void estimate(int lines, double (*pf)(int)){
	using namespace std;
	cout << lines << " lines will take ";
	cout << (*pf)(lines) << " hour(s)\n";
}